Abstract
The magnetocaloric effect in Ni–Co–Mn–In alloys is studied at low magnetic field, across the first order magnetostructural transition. The Co doping at Ni site induces the large magnetic entropy change (ΔSm) above room temperature. The large ΔSm of 11J/KgK has been observed for disordered Ni1.81Co0.22Mn1.46In0.51 alloy at 337K at an applied field of 1.5Tesla. The influence of quench atomic disorder on the magnetocaloric properties of Ni–Co–Mn–In alloys has been studied. The atomic disorder significantly increases the peak value of ΔSm and decreases the peak width. The refrigeration capacity (RC) is almost unchanged with atomic disorder.
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